coped steel bungs are 3/4" diameter and are blind threaded (hole does not go all the way through) with 5/16"-18 thread

bolts 4051 nuts and washers used on 1948-1950 61" and 74" Twins

but they make removal of the float bowl easy and fast

Here's your solution

offering modern features while maintaining compatibility with classic setups

#SPC-028 1/2 ID x 1/4 Length Chrome Plated Steel Universal Spacer - 5 Pack Subcategory_Exhaust Mounting Brackets & Hardware coped steel bungs are 3/4"Colony Machine #SPC 028 1 2 ID x 1 4 Length Chrome Plated Steel Universal Spacer. Size: 1 2 inside diameter x 1 4 inch length. 15 16" ouside diameter. Bag of 5 pieces. Made in Ohio, USA.